The max voltage rating at these points is right at 3.5v. It does get lower depending on the batteries you are using and how much power they have left, but the max voltage is 3.5v and it is recommended that you base your led mods off of this number for the best results.
xbox 360 leds
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Xbox 360 Wired and Wireless Controller AXBY SMD LED Light Mod
The first thing you need to do is take apart your controller so you have just the board. Please check the link below to do this if you do not already know how:How to Open The Xbox 360 ControllerOnce this is done you will need the following items:4 x 0603 SMDsWireSolderSoldering IronHot Glue GunResistors (make sure you have the correct...